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PDF NJM2819A Data sheet ( Hoja de datos )
| Número de pieza | NJM2819A | |
| Descripción | LOW DROPOUT VOLTAGE REGULATOR | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJM2819A
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The NJM2819A is a low dropout voltage regulator with ON/OFF
control.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
It delivers up to 7V/2A output power with the maximum input
voltage of 10V.
The NJM2819A is suitable for audio/video and digital applications.
FEATURES
High Ripple Rejection
65dB typ. (f=1kHz,3V Version)
Output Noise Voltage
Vno=42µVrms typ. (Vo=3V Version)
Output capacitor with 4.7µF ceramic capacitor (Vo≥2.1V)
Output Current
Io(max.)=2.0A
High Precision Output
Vo ±1.0%
Low Dropout Voltage
0.1V typ. (Io=1.0A, 3.0V Version)
ON/OFF Control
Internal Short Circuit Current Limit
Internal Thermal Overload Protection
Package Outline
TO-252-5
PIN CONFIGURATION
3
12 3 45
1. VIN
2. CONTROL
3. Vo
4. N.C.
5. GND
NJM2819ADL3
EQUIVALENT CIRCUIT
PACKAGE OUTLINE
NJM2819ADL3
VIN
CONTROL
Current
Limit
VOUT
GND
Bandgap
Reference
Thermal
Protection
Ver.2010-02-08
-1-
1 page  
TYPICAL APPLICATION
1 In the case where ON/OFF Control is not required:
VIN VIN VOUT
4.7µF
NJM2819A
R
CONTROL
GND
NJM2819A
*4
4.7µF
VOUT
*4 : 1.8 ≤Vo<2.6V version : Co=10µF
Connect control terminal to VIN terminal
2 In use of ON/OFF CONTROL:
VIN VIN VOUT
4.7µF
R
NJM2819A
CONTROL
GND
*4
4.7µF
VOUT
*4 : 1.8 ≤Vo<2.6V version : Co=10µF
State of control terminal:
•“H”→ output is enabled.
•“L” or “open” → output is disabled.
In the case of using a resistance "R" between VIN and control.
The current flow into the control terminal while the IC is ON state (ICONT) can be reduced when a pull up resistance
"R" is inserted between VIN and the control terminal.
The minimum control voltage for ON state (VCONT(ON)) is increased due to the voltage drop caused by ICONT and the
resistance "R". The ICONT is temperature dependence as shown in the "Control Current vs. Temperature"
characteristics. Therefore, the resistance "R" should be carefully selected to ensure the control voltage exceeds
the VCONT(ON) over the required temperature range.
Ver.2010-02-08
-5-
5 Page 
NJM2819A_3.0V
ON/OFF Transient Response without Load
7 10
65
5
Control Voltage
4
@:Ta=25°C
3 VIN=4.0V
Io=0mA
2 Co=4.7uF(Ceramic)
0
-5
-10
-15
1
0
-1 0
Output Voltage
4 8 12
Time : t(s)
-20
-25
-30
16 20
3.10
3.08
3.06
3.04
3.02
3.00
2.98
2.96
2.94
0
NJM2819A_3.0V
Load Transient Response
1500
1000
Output Current
500
0
-500
Output Voltage
@:Ta=25°C
VIN=4.0V
Io=500-1000mA
Co=4.7uF(Ceramic)
-1000
-1500
-2000
-2500
40 80 120 160 200
Time : t(ms)
NJM2819A
7
6
5
4
3
2
1
0
-1 0
NJM2819A_3.0V
ON/OFF Transient Response
10
5
Control Voltage
@:Ta=25°C
VIN=4.0V
Io=100mA
Co=4.7uF(Ceramic)
Output Voltage
0
-5
-10
-15
-20
-25
-30
4 8 12 16 20
Time : t(ms)
1.80
1.75
1.70
1.65
1.60
1.55
1.50
1.45
1.40 0
NJM2819A_3.0V
Input Transient Response
7
6
Input Voltage
Output Voltage
@:Ta=25°C
VIN=4.0V
Io=100mA
Cin=4.7uF(Ceramic)
Co=4.7uF(Ceramic)
5
4
3
2
1
0
-1
40 80 120 160 200
Time : t(µs)
Ver.2010-02-08
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
- 11 -
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet NJM2819A.PDF ] | |
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